:Dear Mr Ryu:
I'm sorry, enormously for any inconvenience that might have caused you with respect to what happened.
I simply wanted to send simple note to apologize, I am aware of what he did.
as shown by my understanding in matter. accept my most sincere apologies, I apologize for my inappropriate behavior, the truth is I do not know what I was when I made that mistake, I beg your and I want our friendship to go forward. As good friends we are, what has happened between us has not been decisive in our friendship. I ask you to soften your heart and understand me